Leather Trimmers

[Redneck Rocket]

I say leather - actually looking for some work done in Vinyl. I have a MkIV Spitfire which I recently put a roll cage in. The hoop on the driver's side sticks up above the roofline, which means the soft-top won't go over it. I need somewhere relatively inexpensive that will basically stitch a 2ft x 2ft pouch into it to accommodate the roll hoop. I'm SW London. Anyone know any reasonable businesses nearby? Not looking for a Rolls-Royce quality upholsterer, just a good job at an honest price.